Using active contour models for feature extraction in camera-based seam tracking of arc welding

Jinchao Liu, Zhun Fan, Søren Olsen, Kim Christensen, Jens Kristensen

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    Abstract

    In the recent decades much research has been performed in order to allow better control of arc welding processes, but the success has been limited, and the vast majority of the industrial structural welding work is therefore still being made manually. Closed-loop and nearly-closed-loop control of the processes requires the extraction of characteristic parameters of the welding groove close to the molten pool, i.e. in an environment dominated by the very intense light emission from the welding arc. The typical industrial solution today is a laser-scanner containing a camera as well as a laser source illuminating the groove by a light curtain and thus allowing details of the groove geometry to be extracted by triangulation. This solution is relatively expensive and must act several centimetres ahead of the molten pool. In addition laser-scanners often show problems when dealing with shiny surfaces. It is highly desirable to extract groove features closer to the arc and thus facilitate for a nearly-closed-loop control situation. On the other hand, for performing seam tracking and nearly-closed-loop control it is not necessary to obtain very detailed information about the molten pool area as long as some important features are obtained, e.g. the groove position and gap width. To obtain these features without external illumination, a new image analysis scheme based on active contour models was proposed and verified by experimental results.
    Original languageEnglish
    Title of host publicationInternational Conference on Intelligent Robots and Systems, 2009. IROS 2009. IEEE/RSJ
    PublisherIEEE
    Publication date2009
    ISBN (Print)978-1-4244-3803-7
    DOIs
    Publication statusPublished - 2009
    EventInternational Conference on Intelligent Robots and Systems, 2009. IROS 2009. IEEE/RSJ -
    Duration: 1 Jan 2009 → …

    Conference

    ConferenceInternational Conference on Intelligent Robots and Systems, 2009. IROS 2009. IEEE/RSJ
    Period01/01/2009 → …

    Bibliographical note

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    Cite this

    Liu, J., Fan, Z., Olsen, S., Christensen, K., & Kristensen, J. (2009). Using active contour models for feature extraction in camera-based seam tracking of arc welding. In International Conference on Intelligent Robots and Systems, 2009. IROS 2009. IEEE/RSJ IEEE. https://doi.org/10.1109/IROS.2009.5354390